XL500 noisy top end, inspection

My XL500 started making alot of top end noise, and I had to open it up and find out

[@davehemeon6540]

Looks like you were able to get the cylinder head off easy enough. The previous owner of mine used silicon gasket and I can get it to budge with putty knifes, flatheads, razor blades, sharp chisels…nothing is working!